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题名: Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability
作者: Li, Yuning1, 2;  Liu, Shenglin1;  Zhang, Zekai1;  Me, Sujuan1;  Zhu, Xiangxue1;  Xu, Longya1
通讯作者: 徐龙伢
关键词: HZSM-5 zeolite ;  alkali treatment ;  aromatization ;  isomerization ;  1-hexene
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2008-04-01
DOI: 10.1016/j.apcata.2007.12.026
卷: 338, 期:1-2, 页:100-113
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 804
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The HZSM-5 zeolites with micro-mesopore hierarchical porosity have been prepared by the post-synthesis of alkali treatment, and tested in the aromatization and isomerization reactions of 1 -hexene in a continuous flow fixed bed. Effects of several variables upon the controlled formation of mesopores have been thoroughly investigated. The results showed that new mesopores could be created and enlarged on ZSM-5 zeolite by increasing the NaOH concentration, temperature and treatment time employed in the alkali treatment, among which the NaOH concentration was the most effective variable in the studied extent. However, excessive high NaOH concentration induced the collapse of zeolite framework, while high temperature and long treatment time induced the backward deposition of amorphous Si onto the zeolite, which would decrease the amount of formed mesopores. When the properly alkali-treated HZSM-5 zeolites were used as catalysts, the reaction activity of 1-hexene was enhanced, and the stabilities of aromatization and isomerization reactions were improved while that of the cracking reaction was deteriorated. These variations of reaction stabilities were associated with the introduction of mesopores over the zeolites, which shortened the diffusion pathlength of the feed/ products and reduced the channel blockage. (c) 2008 Elsevier B.V. All fights reserved.
关键词[WOS]: MODIFIED ZSM-5 CATALYSTS ;  MFI ZEOLITES ;  SKELETAL ISOMERIZATION ;  N-OCTANE ;  ACIDITY ;  DESILICATION ;  DEALUMINATION ;  MESOPOROSITY ;  ALKANES ;  HYDROISOMERIZATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000254905200015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100083
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Li, Yuning,Liu, Shenglin,Zhang, Zekai,et al. Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability[J]. APPLIED CATALYSIS A-GENERAL,2008,338(1-2):100-113.
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